Hamilton was granted the land by William Penn's heirs and is credited with founding the city of Lancaster with his son James. Watchmakers like Gruen, however, destroyed their records, making exact dating impossible. The sides and front of the metal will usually be decorated with engraved patterns. It seemed that all eyes were fixed on the future. Method 2 of Bausman, John F. What do I do if my Bulova watch doesn't have any lettering and no brand name? This article has been viewed 39, times. Sometimes it is easy to answer, and sometimes it is impossible.


The page includes a calculator along with instructions and example images to help you find the movement caliber, case code and serial number on the back of your watch. The calculator uses these codes to do its magic. If you don't know how to find these numbers on your watch please read our instructions below. You can also view the entire datefinder database. We encourage people to send us additions and corrections. Most Seikos have a "retail" model number that is displayed in the store but not written anywhere on the watch. They also have a "reference" model number that is written on the case back. This reference model number is a combination of two numbers: movement caliber case code Each of these two numbers are four digits long and they are separated by a hyphen. In the example images the reference model number is highlighted in red. The other number you will need is the serial number. This is also on the case back and is six digits long. In the example images the serial number is highlighted in blue. Every watch has a unique combination of reference model number plus serial number. The first digit of the serial number tells you the last digit of the year the watch was made. Looking at the example images: for example 1 the year ends in 0 for example 2 the year ends in 2 for example 3 the year ends in 4 You may notice this does not tell us which decade.

InGeneral Ulysses S. The Adams and Movrment Watch Company was built right beside the turnpike. Perry was a watch dting, and Mr. Adams was an organizer and promoter. They brought skilled watchmakers to Lancaster and began production in Like so many infant industries, Adams and Perry did not have enough capital to market their product.

The Lancaster Watch Company continued to suffer growing pains and was reorganized again inthis time dating watch movement the Keystone Standard Watch Company. Nevertheless, the financial problems persisted until In that year, the Hamilton Watch Company came into existence as a result of yet another reorganization. The name, Hamilton, was selected to honor Andrew Hamilton, original owner of the Lancaster site on which the factory was situated.

Hamilton was granted the learn more here by William Penn's heirs and is credited with founding the city of Lancaster with movsment son James. Aurora machinery was moved to Lancaster in summer of Among the leading business and professional men of Lancaster who founded the Hamilton Watch Company were J.

Bausman, John F. Brimmer, Harry Dzting. Cochran, Frank P. Coho, C. Fondersmith, George M. Franklin, John Sener, John C. Hager, J. McCaskey, H. North, Martin Ringwalt, J. Frederick Sener, William Z. Sener, James Shand, Peter T. Watt and H. Charles D. Rood movementt Henry J. Cain of Springfield, Massachusetts represented the Aurora wach. The Hamilton Watch Company was founded in and set out to serve the railroad market with accurate timepieces.

The rugged, precision watcu that Hamilton produced became a favorite among railroad watch inspectors and personnel. In fulfilling the railroads' requirements for accuracy, it also filled the needs of the general public for datch timepiece of high quality. Miller, vice-president, left Lancaster to become its general manager. Trademarks of the E. Howard Watch Company dating watch movement acquired by Hamilton in Although never extremely active in the manufacture of "Howard" watches, Hamilton has produced small quantities under this brand name.

American soldiers during World War I preferred the smaller size and convenience of the wristwatch to the "old-fashioned" pocket watches. This trend caused a major shift in American watch production, with a new emphasis on producing wristwatch models for both men and women. During World War II, Hamilton ramped-up production of several models of chronometer to meet the US Armed Forces particularly the US Navy's need for an extremely accurate timepiece which could be used for navigation at sea.

Dating watch movement to WWII, such highly accurate instruments were only produced abroad. The first Hamilton chronometers were delivered to the Navy in Februaryand at their peak Hamilton was making chronometers per month!

Based on the super-reliable B with Elinvar hairspring and mono-metallic balance, the Mod 23 adds a chronograph mechanism, making it one of the most complicated watches produced by Hamilton.

Hamilton has always been on the forefront of horological innovation. The Elinvar hairspring was patented in and used in all movements thereafter. The name Elinvar was derived from the term "Elasticity Invariable" and was the first alloy to resist the changes in elasticity wafch occur with changes in temperature.

In DaingHamilton introduced the world's first electric wristwatch, a breakthrough for the industry and the first basic change in portable timekeeping since the early 16th century. Powered by a tiny 1. The electric current necessary to operate one watt bulb for one minute could run an electric watch for 20 years. The Hamilton Electrics featured not only a revolutionary movement design, dating watch movement mkvement were known for their avant garde styling, making them among the most collectible watches today.

Also mocement the mid-fifties Hamilton embarked on a program of expansion and diversification. As a result, the company produced watches under three brand names — Hamilton, Vantage and Buren movemenh in six plants in this country click the following article abroad, manufactured radioactive dating shows that the and plated silverware, fabricated and processed rare and exotic metals, and produced mechanical and electronic measuring devices and components.

Hamilton also produced rocket fuel alloys, special metals for the Apollo program, missile timers and safety and arming devices for military applications. Hamilton continued to produce some of the finest American watches untilearning them the distinction of being the only American watch company to survive global competition will into the 20th century. They truly represent the pinnacle of American movemetn. If you own a modern, dating black site quartz Hamilton Watch, you should know that it sating no connection to the original Hamilton Watch Company.

Watches bearing the Hamilton name can still be found today, but the brand is now owned by the Swatch Group, one of the largest Swiss watch conglomerates. Any Swatch service center can perform repairs on your modern Hamilton watch. Be sure to use watcb serial number on the movement the works of the watch. Do not use the serial number from the watch case. Click here for an explanation datiny example of how to use our serial number tables.

Need help finding the serial datch on your datijg Click here for instructions on how to identify and open most common case types. Hamilton also used serial numbers preceded by a letter on certain grades from about the late 30's until the late 60's. The following tables can help in identifying these watches. It is sometimes necessary to interpolate to estimate the particular year of a watch. At Renaissance Watch Repair, we are experts in the repair and restoration of Hamilton watches, source they are one of click at this page personal favorites to work on!

Dating watch movement are also always looking for Hamilton watches to purchase. Please contact us if you have any questions about the repair of your vintage Hamilton watch.

Goddard Gruen Hamilton Hampden E. Hamilton factory: Using a precision scale to fit balance screws to a balance. Hamilton Ventura modern repro.